It takes experience to achieve those numbers. If you have
not driven on a drag strip for a long time, deduct about .5 second from the
example times.

The start is very important. Generally, wheel spin should
occur for one half to one car length. A good beginning point is to use 2000
rpm for a starting speed. Donít pop the clutch, let it out over about one half
second so that the car gets a good push from the tires before they break loose
and spin. If in doubt, less wheel spin is better than more. Watch the 60í
time. If you donít get a perfect start, a bogging start will have a better 60í
time than a spinning start. Again, use 60ítimes as a guide, not how the start
feels.

The 60' time has a big effect on ET. Generally for the
ZR-1, every tenth of a second relative to a 2.00 second 60' time is a gain or
a loss. With a 2.00 60' foot time the car should be able to run the ETís
listed. For example for a 2.5 second 60 foot time add .5 second to the ET.
12.9 + .5 = 13.4. If you use drag radials and get a 1.8 '60 foot time, 12.9 -
.2 = 12.7 ET.

Shift at 6800 rpm for stock engines. 7000 rpm for ported
engines.

Engine heat is a huge performance damper. The engine will
make best power at about 175 degrees coolant temperature. 175 degrees is at
about 40% of the scale on the temperature gauge. Oil temperature should be
over 140 degrees for lubrication and to reduce oil pump drag. You will never
run a great time on a 90 degree day. The best conditions for trying to set new
personal record are with ambient temperature between 45 and 70 degrees and low
humidity.

The air filter can cause variations in performance. I
recommend either installing a new AC filter before going to the track, or
remove the air filter at the track to eliminate the possibility of a power
loss due to the condition of the filter.

Set the shock absorbers to Tour for best weight transfer
to the rear of the car.

Try to run with one half tank of fuel. Excess fuel weight
slows the car. The power to weight ratio of a 400 hp ZR-1 is about nine pounds
per hp. If you are carrying five gallons of excess fuel itís like losing about
five hp.